Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/android-ci.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Project Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: set up JDK 21
         uses: actions/setup-java@v5
@@ -46,7 +46,7 @@ jobs:
           ls /dev/kvm
 
       - name: Project Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: set up JDK 21
         uses: actions/setup-java@v5

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Project Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Release
         uses: softprops/action-gh-release@v2